/*

 * Copyright (c) 2014, Oracle and/or its affiliates. All rights reserved.

 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.

 *

 * This code is free software; you can redistribute it and/or modify it

 * under the terms of the GNU General Public License version 2 only, as

 * published by the Free Software Foundation.

 *

 * This code is distributed in the hope that it will be useful, but WITHOUT

 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or

 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License

 * version 2 for more details (a copy is included in the LICENSE file that

 * accompanied this code).

 *

 * You should have received a copy of the GNU General Public License version

 * 2 along with this work; if not, write to the Free Software Foundation,

 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.

 *

 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA

 * or visit www.oracle.com if you need additional information or have any

 * questions.

 */

/* @test

 * @bug 7011804

 * @summary SequenceInputStream#read() was implemented recursivly,

 *          which may cause stack overflow

 */

import java.io.ByteArrayInputStream;

import java.io.InputStream;

import java.io.SequenceInputStream;

import java.util.Enumeration;

public class LotsOfStreams {

    static final int MAX_SUBSTREAMS = 32000;

    public static void main(String[] argv) throws Exception {

        try (InputStream stream =

                new SequenceInputStream(new LOSEnumeration())) {

            stream.read();

        }

        try (InputStream stream =

                new SequenceInputStream(new LOSEnumeration())) {

            byte[] b = new byte[1];

            stream.read(b, 0, 1);

        }

    }

    static class LOSEnumeration

            implements Enumeration<InputStream> {

        private static InputStream inputStream =

                new ByteArrayInputStream(new byte[0]);

        private int left = MAX_SUBSTREAMS;

        public boolean hasMoreElements() {

            return (left > 0);

        }

        public InputStream nextElement() {

            left--;

            return inputStream;

        }

    }

}